BRITNEY Spears’ second trip down the aisle promises to be far more glamorous than the first – though out-styling a Las Vegas chapel won’t be hard.

While the details of the prenup (will she or won’t she?) are still being argued, the princess of pop will be skimping on nothing when it comes to her November nuptials with Kevin Federline.

The event will reportedly cost upward of $1 million, and sources say more than $150,000 is being spent on importing white tulips from Holland, along with a pre-order of 300 bottles of Cristal champagne – at $260 a pop.

Given her no-expense-spared budget for pulling off the wedding of the year, The Post asked five of New York’s top event planners for their suggestions on everything from the gown to the honeymoon.

Should she wear couture or cutoffs? Should she serve gin and tonics or ginseng and Red Bull? Here’s a three-page guide to what our panel of experts recommends.

TROPICAL PARADISE

Lizzie Grubman, Public Relations executive

Dress: “It has to be Vera Wang,” says Grubman. “Since she is known for dressing in next to nothing, this would be a good opportunity to begin a new stage in her life with a dress that is sexy but still respectful of the sanctity of marriage – low-cut, floor-length, with lots of lace and beading.”

Venue: The Ritz-Carlton in Laguna Beach, Calif., on the cliff overlooking the ocean. “A beach setting at sunset is always romantic, and would be especially appropriate since that’s where she and Kevin first went public with their romance,” she says.

Flowers: Big bouquets of magnolias on the tables, in her hair and woven into an archway under which they’d exchange vows.

Cake: A six-layer Sylvia Weinstock-designed cake covered with edible roses. Honeymoon: The Wakaya Club on the island of Wakaya in the Fiji Islands. “She and Kevin should go somewhere completely secluded to escape the media, for once.”

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OVER-THE-TOP NEW YORK

RON BEN ISRAEL, CAKEMASTER

Dress: “Britney should have at least three outfits to suit different parts of the wedding celebration,” says Ben Israel. “I can see her walking down the aisle in an embroidered Candice Solomon princess gown. For the reception, she’d wear a diamond-encrusted Michelle Roth dress. And for dancing, Britney should wear an incredibly sexy Randi Rahm number.”

Venue: “Why choose just one location?” he says. The ceremony should be held at the New York Palace, followed by cocktails in the rooftop ballroom of the St. Regis, a sit-down dinner at the Pierre, and dancing at the new Mandarin Oriental on Columbus Circle. The evening would culminate in a cake-cutting ceremony under the stars on the Great Lawn in Central Park at midnight – complete with fireworks.

Cake: “It would be abundantly decorated with romantic sugar blossoms,” he says. “I’m thinking jasmine blossoms, peonies, honeysuckle, sweet peas and musk roses.” The flavors could be reminiscent of Britney’s Southern roots – multi-layers of angel food and coconut cake filled with peaches and cream and topped with pecan praline.

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EMERGENCY IMAGE REHAB

SIMON DOONAN, STYLIST

Dress: A simple white suit “like the Yves Saint Laurent suit Bianca Jagger wore when she married Mick,” says Doonan. “The look would be very groovy and hip, but still conservative.”

Venue: “My apartment! I would love to meet her and ding some sense into her. Where Madonna failed, I will succeed.”

Flowers: Lilies of the valley – “This is what I like, and since the wedding is in my apartment, I get to choose,” he says.

Cake: A Sylvia Weinstock creation “in the shape of a chastity belt, to reinforce the concept of decorum and restraint.”

Honeymoon: “Nowhere cheesy like Ibiza or St. Tropez,” he says. “The new Britney must go somewhere wholesome and American, like Yosemite or the Grand Canyon.”

Rings: “Since the outfit is so simple, I will allow Britney to go over the top with the ring. She could pick something amazing from Gem Palace by Munuu at Barneys.”

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“GONE WITH THE WIND”

CARLEY RONEY, EDITOR-IN-CHIEF OF THE KNOT

Dress: “I envision multiple wardrobe changes,” says Roney. “The evening would begin with a traditional princess-for-a-day gown from designer Reem Acra with a fitted, strapless corset bodice and a cathedral-length train. “For cocktails, she would change into something less voluminous – a lace sheath with a fluted skirt and soft pink accents.

“And at the reception, she would wear a sexy, mini-gown by Vera Wang and a pair of jeweled strappy heels from Jimmy Choo.”

Venue: The Oak Valley Plantation on the Mississippi River. “It features a quarter-mile avenue covered in a canopy Of giant oak trees which will keep the paparazzi helicopters away,” she says.

Cake: A 6-foot-tall red velvet iced pink fondant cake embellished with tiny gold butterflies and emblazoned with her new monogram in 14-karat gold by designer Margaret Braun. The groom’s cake would be a sprawling sheet cake soaked with bourbon and pecans and “embellished with a giant Von Dutch logo, of course.”

Rings: “Britney should take her vows with her mother’s wedding band, but she should also add a simple diamond eternity band – like Fred Leighton’s designs – to her already gorgeous 5-carat sparkler,” says Roney. “Hopefully, she’ll let her new husband foot the bill for this one.”

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HOME SWEET HOME

RACHEL ASHWELL, FOUNDER OF RACHEL ASHWELL SHABBY CHIC

Theme: Home sweet home

Dress: “Britney should wear a lingerie-inspired vintage gown made of ivory-colored silk and lace,” says Ashwell.